Extension-table lock.



C. S. BURTON. EXTENSION TABLE LOIL APPLICATION FILED JUNE 10, 1007.

9011.951. Patented 000211908.

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y C. S. BURTON. EXTENSION TABLE LOCK. APrLIoATIo'N FILED JUNE 1o, 1907.

901,951. Patented 0ct.27,1908.

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C. S. BURTON. l EXTENSION TABLE LOCK. APPLIGATION FILED JUNE 1o, 19o?.

Patented Oct, 27,1908.

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HAR-LES BELTRTIN, UF OAK PARK, LLW'CS, 'ESIGNCH TO EBEL TYDE'N, GF HASTINGS, T

which the olldwng is a. sp2( calom mi* Gaps? S? di l A 1Q The purgume nl? llif@ nwnli@ is 250 pr lrss: Such attzmlmn i mom @01p- 6.9 Vid@ anlmproved device for locking mgatllel: 1110?). typ@ of pedestal table dIeclc,--tlml 1s, the parts of am extesom l'fublc, esgeallgf S@ 1m to make the, pdesal membe rigid adapted fm su @polling lille table, not only with ill@ correspomlng tabl@ mmnbmfwlm when fully ahmed bul; nl; :my poli. t9 Wlflil'l bridges, 87 bing mad@ rigid; with the 15 it may be Qxlndad, with:lnparposed'leaves (,utsmwstslides, l); G, and tlm mlzl'zff Wh 'like 7G- liefsn innermost slides, l?? I?? which am rigid with .mum-ifm li .the SWG table nu'embexfs respectively. For

fremder :falle Lflljlf :l eriteuswl@ to cert'an extent;- witlmmn l wn-l W im pedestal. as 75 Shown irl lll@ dmv/ lhls applicatiom, lle@ pedsal caps o1 by a, 5l? of one pedes ml xmembev are conneifl'ed l@ the slde7 9% 9a, Wlliuh n'erfwne beweem ill@ oul'ermost and he middle Slides? :md the mrrespfmdng 80 bridge o1 lli@ ul-1191i pedwml member is; conn walled 0 ille salidas? l), l07 which nlvexjwne lmween lla@ lnrnmslaml the middle Slidesa. xllmn my larger number slides is em- "0 played they will manually intervene bekwaam 35 @nl posztlmn Egg; ll lflm mlddl slld@ :md hle 312ml: slid@ 0u @Hillel der the lower and secured .l as seen end el' lne roi-lq shaft which exten-ds past'` the lower ede-e otV the miterinost slides it is provided with a erank arm. lI-, both cranks extendine' toward the rifrht hand for operatin;r the looking' devices of the right-han( meinberol the table, and 0n the rook shaft inside of the innermost slides respeetively there are provided two simla r 'e1-ank arms. 14. t4. extending in the dl'iposjte direetion tor operating' the ieekingr derives 'for the lett-hand table member. To each ot the eranliv arms, 1?), 1?), there are pivotally ronneeted pawls, t5, 15, provided with means, as. for example., counterweights, it". operating to uphold the pawls toward the plane ot the tal-ile. itlaeh pawl has at its end reinote from the crank an inwardly `hittingV stud or finger. 15u', which extends aeros the lower edgfes oi' all lthe slides outside thtl middle slide. are Connected similar pawls, it), i9, whirl) 4extend outward Ytroni the eranlis alongside the innermost slides and h: Je ou'wardljv juttingf fingers, 20,. 2t), extending.;` aeross be low the tower edges ot' all the slides ioeated inward troni the middle slides. rlhe lower edges ot' the slides outside the middle slides are provided with ratehet teeth, 2Q, Q2. haring their abrupt shoulders facing toward the outer end ot5 the table member to whit-,l1 the` yslides pertain in position to be engaged by the studs or lingers, lt, of the pawls, la, for resist-inel the outward er extending' moveineat, ot' the slides, and for dravv'ingV the slides inward when the links are pulled in-- ward. The noteh'es in the several .slides aril separated by interralswqaal tol'ialf the unit tiller width, the iillers, Q5, being all oi" the ,saine width, and in the drawings they ina)Y be nnderstoml as about nine inches in width eaeh, making the dstanee between ratehet teeth inches. The inner slides .similarlyy have their lower edges provided with ratchet teeth, 22, similarl')7 spaeed.`

When the table is closed up without extension, the ratchet.. teeth are Vin position to be engaged by the ting-ers, is and Qtr, respectively el the palwls whieli are operated by the several era nhs. of the reel( sbatt, and the shaxt't being roeked in direetion to (carry the cranks iespeetirely to the opposite side 0f the axis `of the shaft from that to which the pawls i'ron'x the respertive eranlis extend, the pawl tiirg'ers are engaged with the ratehet teeth. and it the table members 1re l not'. tightly elosed together the roinpletion otA the working niorenient, ot' the shaft to the position at, which the eanhP wrists are alined with the pawl lingers at the opposite side of the roeli sha l't'. therefrom will draw the table n'iemliers tightly together, and the eranlewrist haring' been earried the slightest degree beyond that position, the parts be To the erank arms, ist. there eome looked, beeanse any pull on the table t members tending to separate them would l operated by the rook shaft, the extreme tend to roel( the shaft 'further in the direi-- tion in wlneb its roekine' inoreinentis pre welded by the pawls. it). whirli at that po.-ir

tion are. stopped against th(` bridge. l.

"When it is desired to extend the table. the shatt beine' roeked in tln` opposite direetion first thrusts the pawls outward. earryint! their lingers. bark troni the ratchet teeth ot the slides` and a little less than a halt" revolution ot' the roetY shaft being niade in thisl reverse dirertion the pawls are thrust out in line with their eranhs. 'ihe pawls` t5. are stopped against further Change ot' angle with respect to their eranls by studs, i113. whirh jut oi'i' vtroni short extensions. 37, ot' the rranhs and eoltide with the upper edges ot the pawls respertnfelv at the pointof greatest, extension or outward thrust thereof, and ral-r)r thein downward, takinggrr the iingers. lt''out (it-the path oi" the ratchet teeth ot the slides. For elim-ting; a sin'iilar result with respeet to the pawls, i9, eonnefted with the'eranks. tt. there i?? provided a trip finger.. 2S. on a brat-het. 29,'1nonnted on the under side of the center leg bridge, and with this trip finger the pawi eollides at the saine tiine in the roekinp; ot the shaft that the studs. 2G. collide with the pawls, 15, and this eollision anses the further movenient` o" the eranlc by rarivine the inner end ot thel pawls upward, to tip the outer ends downward for disengagement of their tin,- gers, 2th troni t'fbenotehes ot the slides.

The roel; shaft. t2, has an operating; arin, tl. at one end terminating in ay eranlc handle, ill. said a'rni being; eonreniently Jforged onto the pawl e.\:ten.s"ion. 2T, and appearing as a eontinnatiou therein.E haek past. the end ot' the shait. as seen in Figs. l and 2".

i rlaini im Y l. In an extension table, in combination with they extensible table top nienibers, the sets et" slides whieh eonneet them for exten-` sion eonsistingl eaeh otc a middle Slide and exterior aud interior slides, the extreme exterior and interior slides being Connected t0 the opposite table members and adaptedto be withdrawn in opposite direetions from' at opposite sidi-s oll sneh middle slide, the

extreme slides at eaeh side bein; eonneeted respeetively to the opposite table members and adapted to be withdrawn in opposite ireetions from the middle slide; a reel( snal't earried by the middle slides; pawls slides having ineans pawls therewith for drawing. and holding them 1n direction resisting extension.

3. In an extension table, in combination ywith the separable table 1nembers,two sets of slides connecting thein tor extension oonsisting each o'l' ay middle slide and slides in ene-h set at opposite sides ol the middle slides respectively, the extreme exterior and the extreme interior slides. boing eonnefvted respectivelyA to the opposite table members and adapted to be withdrawn in opposite directions from the middle slides: a bridge bar connecting the middleI slides rigidly; a rook shaft mounted on thi` bridge bar; two sets of pawls operated by the rook shaft engaging respectively the interior and exterior slides, seidvslides having devices for engagement ot the pawls therewith to retract the slides and resist extension thereof.

Vet. ln an extension table. in uoinbiiration with the -separable table inen'ibers, two sets of slides which connect them for extensioin and fillers adapted to be interposed, each set comprising' :i middle slide und exterior and interior slides at opposite sides oftheanldlle slides'respeetively, all said exterior and interior slides being' ratehetedi the step intervals between the ratchet shoulders being half the nnit filler width, and means carried by the middle slides cooperating with'the ratchet shoulders -tor resisting extension.

In an extension table,' in combination with the separable table members, the slides which connect them -for extension; a rock fshaft carried by. the middle slides having1r end cranks outside-the outermost slides and intermediate cranks between the two sets of slides, said end and .intermedintecranks being extended in .opposite directions from for engagement of the l the shaft,v the slides which are movable withl resiect to Athe middle slides for extension being'ratcheted on their lower edges; pawls on the end cranks engaging the ratchets of the slides outside the' middle slides, and pawls on the intermediate cranks engaging the retehets of the slides inside the middle slides. i i

.6. In an extension table, in combina-tion with the separable table me1nbe1\s,- slides for conneoting them for extension and fillers adapted to be interposed; e rook shaft oar ried 'by the" middle slides having extreme cranks outside the outermost slides and interinediate cranks inside the innermost slides oi.' the two groups, all the slides which move relatively to the middle slides for extensionI having rateheted edges, the stepintervalsbetween the ratchet abutment-s being substantially half theunit filler width; pawls' on the intermediate cranks for engaging the rntoheted edges of the inner slides and on the extreme cranks for engaging the ratchf eted edges of the outer slides, the cranks being ot" such length thattheir throw Within the range of rockingr movement of theshaft is sutlieient to aotnate'the pawls the ratchet step distance, the rook shaft having a range' of rocking movement forearrying the cranks to locked position at opposite sides of' the rook shaft from that at which their pewls ,are engaged for locking'the slides et re y traetecl position.

In testimony whereof, I have hereunto set my hand' at Chicago, Illinois, this'i'th day of June, AL D., 1907.

. CHARLES S. BURTON. lWitnesses I A M. GERTRUDE ADY, 

